Calibration apparatus



FIG. 1 is a perspective view of a calibration apparatus showing our new design;

FIG. 2 is a perspective view viewed from another angle thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a partially enlarged view thereof, taken along line 9 of FIG. 1 ;

FIG. 10 is a partially enlarged view thereof, taken along line 10 of FIG. 1 ;

FIG. 11 is a partially enlarged view thereof, taken along line 11 of FIG. 1 ;

FIG. 12 is a partially enlarged view thereof, taken along line 12 of FIG. 2 ;

FIG. 13 is a partially enlarged view thereof, taken along line 13 of FIG. 2 ;

FIG. 14 is a partially enlarged view thereof, taken along line 14 of FIG. 2 ;

FIG. 15 is a partially enlarged view thereof, taken along line 15 of FIG. 3 ;

FIG. 16 is a partially enlarged view thereof, taken along line 16 of FIG. 3 ;

FIG. 17 is a partially enlarged view thereof, taken along line 17 of FIG. 3 ;

FIG. 18 is a partially enlarged view thereof, taken along line 18 of FIG. 4 ;

FIG. 19 is a partially enlarged view thereof, taken along line 19 of FIG. 4 ;

FIG. 20 is a partially enlarged view thereof, taken along line 20 of FIG. 4 ;

FIG. 21 is a partially enlarged view thereof, taken along line 21 of FIG. 5 ;

FIG. 22 is a partially enlarged view thereof, taken along line 22 of FIG. 6 ;

FIG. 23 is a partially enlarged view thereof, taken along line 23 of FIG. 7 ;

FIG. 24 is a partially enlarged view thereof, taken along line 24 of FIG. 8 ;

FIG. 25 is a partially enlarged view thereof, taken along line 25 of FIG. 1 ;

FIG. 26 is a partially enlarged view thereof, taken along line 26 of FIG. 2 ; and,

FIG. 27 is a partially enlarged view thereof, taken along line 27 of FIG. 2 .

The broken lines in the drawings illustrate portions of the calibration apparatus which form no part of the claimed design. 

CLAIM The ornamental design for a calibration apparatus, as shown and described. 